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Note 5 - Costs and Estimated Earnings and Billings on Uncompleted Contracts (Detail) - Net amount of costs and estimated earning on uncompleted contracts above (below) billings: (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Costs and estimated earnings in excess of billings on uncompleted contracts | $ 20,592 | $ 16,509
Billings in excess of costs and estimated earnings on uncompleted contracts | (18,918) | (18,583)
Net amount of costs and estimated earnings on uncompleted contracts above (below) billings | $ 1,674 | $ (2,074)

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